Dewetting films with inclined contact lines.
Dewetting films with inclined contact lines.
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DOI：
10.1103/physreve.91.023008
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
P. Gao;Lei Li;Xi-yun Lu
中科院分区：
文献类型：
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作者：
P. Gao;Lei Li;Xi-yun Lu
从液体储存器中取出的部分润湿的板引起以倾斜的接触线为特征的液膜的沉积。实验表明，相对于板的接触线速度的法向分量保持不变，并且与倾角无关，这一事实在理论上从未得到证明。我们证明，在润滑理论的框架内，速度-角度的独立性只是近似的，实际上表现出的正常速度与接触线的倾角弱减少。这种相关性是由于微观和宏观尺度的有效分离的变化。此外，接触线的倾斜导致液体的切向通量，该通量被限制在接触线附近。简单的标度关系提供了法向速度和切向通量。
A partially wetting plate withdrawn from a liquid reservoir causes the deposition of a liquid film that is characterized by inclined contact lines. It has been experimentally indicated that the normal component of the contact-line velocity relative to the plate remains constant and is independent of the inclination angles, a fact that has never theoretically been justified. We demonstrate, in the framework of lubrication theory, that the speed-angle independence is only approximate and the normal velocity actually exhibits a weak decrease with the inclination angle of the contact line. This correlation is attributed to the variation of the effective separation of microscopic and macroscopic length scales. In addition, the inclination of the contact line results in a tangential flux of the liquid, which is confined in the vicinity of the contact line. Simple scaling relations are provided for both the normal velocity and the tangential flux.